63427681 has 8 divisors (see below), whose sum is σ = 66870720. Its totient is φ = 59995152.

The previous prime is 63427673. The next prime is 63427699. The reversal of 63427681 is 18672436.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63427681 - 2³ = 63427673 is a prime.

It is a super-2 number, since 2×63427681² = 8046141434075522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63427681.

It is not an unprimeable number, because it can be changed into a prime (63427081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11871 + ... + 16363.

It is an arithmetic number, because the mean of its divisors is an integer number (8358840).

Almost surely, 2^63427681 is an apocalyptic number.

It is an amenable number.

63427681 is a deficient number, since it is larger than the sum of its proper divisors (3443039).

63427681 is a wasteful number, since it uses less digits than its factorization.

63427681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5255.

The product of its digits is 48384, while the sum is 37.

The square root of 63427681 is about 7964.1497349058. The cubic root of 63427681 is about 398.8040968524.

The spelling of 63427681 in words is "sixty-three million, four hundred twenty-seven thousand, six hundred eighty-one".